When I directly connect my iPhone to my computer via cable, and select my device/Info, the ensuing window says: “Your calendars are being synced with your phone over the air from iCloud.â€
But I find that not the case. Grrrrr!
Harv 27" i7 iMac (10.13.6), iPhone Xs Max (12.1)
Those who can make you believe absurdities can make you commit atrocities. ~Voltaire